JP2004235153A - Light guide equipped with reflecting plate - Google Patents

Light guide equipped with reflecting plate Download PDF

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Publication number
JP2004235153A
JP2004235153A JP2004023004A JP2004023004A JP2004235153A JP 2004235153 A JP2004235153 A JP 2004235153A JP 2004023004 A JP2004023004 A JP 2004023004A JP 2004023004 A JP2004023004 A JP 2004023004A JP 2004235153 A JP2004235153 A JP 2004235153A
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JP
Japan
Prior art keywords
rear
segment
light
optical axis
reflector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2004023004A
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Japanese (ja)
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JP4383192B2 (en
Inventor
Lamberterie Antoine De
ドゥ ランブルトゥリー アントワーヌ
Original Assignee
Valeo Vision
ヴァレオ ビジョンValeo Vision
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Priority to FR0301082A priority Critical patent/FR2850731B1/en
Application filed by Valeo Vision, ヴァレオ ビジョンValeo Vision filed Critical Valeo Vision
Publication of JP2004235153A publication Critical patent/JP2004235153A/en
Application granted granted Critical
Publication of JP4383192B2 publication Critical patent/JP4383192B2/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00Arrangements or adaptations of optical signalling or lighting devices
    • B60Q1/0029Spatial arrangement
    • B60Q1/0041Spatial arrangement of several lamps in relation to each other
    • B60Q1/0052Spatial arrangement of several lamps in relation to each other concentric
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24Light guides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235Light guides
    • F21S43/236Light guides characterised by the shape of the light guide
    • F21S43/237Light guides characterised by the shape of the light guide rod-shaped
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235Light guides
    • F21S43/242Light guides characterised by the emission area
    • F21S43/245Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235Light guides
    • F21S43/247Light guides with a single light source being coupled into the light guide
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0005Light guides specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/001Light guides specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device or a lamp that re-guides light beam frontward that exits from a basic cross section through its rear peripheral section. <P>SOLUTION: A linear light guide is generated as a circular basic cross section 16, comprising a front peripheral lighting section 22 and a rear peripheral section 24 including a rear light spreading segment 26, moves along a guide line 18. A light source emits light beam which is incident on the light guide through one end 14. The light beam that is propagated in the light guide and reaches the rear spreading segment 26 as continuously reflected as a whole, is diffused backward, outside its length, and frontward so as to be refracted at the front lighting part. At least one reflecting plate 32 is provided to re-guide frontward light beam Rd that exits through the rear peripheral part 24. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The invention relates to a lamp or a display device, for example for a motor vehicle, comprising a light guide and a light source.

The present invention is also a linear light guide having at least a portion of a substantially circular vertical basic cross-section with a front perimeter illumination portion and a rear perimeter portion including a rear light diffusion segment. A light guide generated by moving along a guide line;
A light source that emits light rays that enter the light guide through at least one end face as guided by the light guide.

  It is common to combine several automotive lighting or display functions in the same housing to simplify electrical wiring for these various functions.

  Each function includes a light source, reflector, and possibly glass, and these various elements emit light or indicating light whose geometric and photometric characteristics must comply with various regulatory standards. Are located. Thus, each function requires a minimum volume to equip individual lights or indicators.

  However, the volume available for mounting lights or indicators is becoming increasingly smaller at both the front and rear of the vehicle. This is because, due to aerodynamic constraints and the design of the designer, the shape can be very different from a shape derived solely from technical considerations.

  Thus, in many cases, there is insufficient space available to consolidate functions in the same housing, in which case it is necessary to distribute the various functions in different housings, thus reducing costs. And wiring and assembly time increase.

  To solve this problem, the use of light guides is known. For example, from EP-A-243 467, a headlight with an elliptical module is known. An annular light guide surrounds the lens of the elliptical module and includes a cylindrical reflector for directing light rays emanating forward from the light guide, and a surface cooperating with the tubular reflector to separate the light. The purpose of such an arrangement is to increase the apparent surface of the elliptical module.

  From EP 0 369 79 A it is also known a light guide having a micro-etched line on its back surface, a reflector being arranged behind this light guide and the micro-etched line being It is located substantially at the focal point of the reflector. This type of light guide seeks to cooperate with another identical light guide arranged in parallel to form a light emitting surface.

  Another light guide made according to the prior art is shown in FIGS.

  The light guide 10 has here two ends 12 and 14. The light guide 10 is intended to guide incoming light rays, in particular via its ends 12 or 14.

  The light guide 10 is realized by a substantially circular basic cross section 16 moving along a guide line 18. The guide line 18 is here substantially at the center of the basic section 16, and the basic section 16 is orthogonal to the guide line 18.

  The shape of the guide wire 18 is freely defined by those skilled in the art, especially according to aesthetic requirements. As shown in FIG. 1, the guide wire 18 is now in the form of a loop.

  In the following description, the longitudinal, vertical or lateral orientation is adopted without limitation, which is indicated by the trihedrons L, V, T in FIGS. Applies locally to the basic section 16. Therefore, the longitudinal direction L is always orthogonal to the respective basic cross sections 16 irrespective of the overall shape of the light guide 10. Thus, the defined vertical direction V may vary according to the shape of the guide line 18, for example with respect to a reference frame for a motor vehicle.

  By convention, the transverse direction T is oriented from the right rear part of FIGS. 2 and 5 to 9 to the left front part of FIGS. 2 and 5 to 9. In the examples shown in FIGS. 1, 3 and 4, the lateral direction T is fixed with respect to the reference frame for the motor vehicle and is indicated by the arrow T in FIGS. 1, 3 and 4.

  As shown in FIG. 2, the contour 20 of the basic cross section 16 has a front peripheral illumination portion 22 and a rear peripheral portion 24.

  The rear peripheral portion 24 has a rear segment 26 for diffusing light. Since the length of the rear segment 26 is shorter than the diameter of the basic section 16, the following description will refer to the rear segment 26 as a point. The main optical axis 28 extends laterally from the rear diffuser segment 26 to the front illumination portion 22.

  As shown in FIG. 3, all rear diffuser segments 26 create a rear light diffuser line that extends parallel to guide line 18 over at least a fixed length of light guide 10.

  The light beam enters the light guide 10 via at least one of the ends 12 or 14. The light rays originate here from a light source, for example, a light emitting diode 30, also referred to as an “LED”, located opposite the end.

  To guide the light, the light guide 10 is formed from a transparent material such as glass or plastic, which has a higher refractive index than the medium in which the light guide 10 resides, especially air.

  As shown in FIG. 3, the light ray Rc incident through the end 14 of the light guide 10 is continuously and entirely on the contour 20 of the basic cross section 16 due to the difference in the refractive index between the air and the light guide 10. By being reflected, the light is guided toward the inside of the light guide 10 substantially in the direction of the guide line 18.

  Thus, when the guided rays Rc reach the rear diffuser segment 26, they are diffused in all directions, in particular towards the rear, and then the diffused ray Rd is converted into a light guide. The light exits outside the light guide 10 and is diffused toward the inside front of the light guide 10.

  A ray Re contained within a given solid angle around the main optical axis 28, diffused towards the front, is refracted and thus at an angle of incidence such that it exits outside the light guide 10, The front illumination portion 22 of the light guide 10 is reached.

  Thus, the front lighting portion 22 performs the necessary lighting or signaling function of the vehicle.

  With this type of light guide 10, a lighting or signaling function can be performed that is compatible with the style and size requirements of the vehicle.

However, a non-negligible portion of the light is diffused toward the rear of the light guide 10, as shown by ray Rd in FIG. Therefore, the light projected toward the front by the light guide 10 does not have an optimum intensity compared to the intensity of the light incident through the end face 14 of the light guide 10.
EP-A-243467 European Patent Application No. 036979

  In order to solve these problems, the invention is characterized in that it comprises at least one reflector, which, from the basic cross-section, redirects the light rays passing through the rear peripheral part forward. A lamp or display of the type described above is provided.

According to another feature of the invention,
The device is positioned opposite the rear diffuser segment along the main optical axis and directs the rays diffused toward the rear toward the inside of the basic cross-section such that they are refracted by the front peripheral part. Equipped with a rear reflector that reflects
In a plane perpendicular to the guide line, the rear reflector is basically such that the rays emitted by the rear segment for diffusing the light it reflects emerge from the front peripheral part substantially parallel to the main optical axis. Has a shape that is refracted by the cross section,
The rear reflector reflects light rays diffused toward the rear toward the rear diffuser segment in a convergent manner,
The rear reflector has a vertical basic cross section whose center is in the shape of an arc arranged approximately on the rear diffusion segment,
The rear reflector is comprised of a layer of reflective material covering the outer surface of the rear diffuser segment,
The front perimeter forms a convergent lens where the object focus is located approximately on the rear diffuser segment;
The rear peripheral portion of the basic cross section includes a top lateral segment for diffusing light, the segment defining a second optical axis extending downwardly from the top lateral diffusing segment in the basic cross section of the light guide, and Diffusing the guided rays down the inside of the length and up the outside of the length,
The optical system is also positioned above the basic cross-section opposite the top lateral diffusion segment along the second optical axis such that the top lateral segment reflects upwardly diffused light rays substantially forward. With a top side reflector
The second optical axis is substantially perpendicular and orthogonal to the main optical axis;
The top side reflector has a parabolic shape in which the object focus is located along the top side diffusion segment to reflect upwardly scattered light rays forward in a direction substantially parallel to the main optical axis. Have
The device is arranged in line with the second optical axis, below the basic cross-section, and diffracts light rays diffused downward by the lateral diffusion segments and refracted by the rear peripheral part forward and parallel to the main optical axis. Equipped with a lower side reflector that reflects,
The rear peripheral portion comprises a lower portion in which the image focus substantially corresponds to the top lateral diffusion segment in the form of a lens, such that the downwardly diffused rays exit parallel to the second optical axis;
The rear peripheral portion of the basic cross-section has a first top lateral diffusion segment and a second lower lateral diffusion segment that are displaced from the first top lateral diffusion segment to a second lower lateral diffusion segment. A second optical axis extending in a substantially perpendicular manner to the segment is defined, and the outer surfaces of the first and second laterally diffusing segments allow light rays to be applied by the laterally diffusing segment in a generally cross-sectional direction in the second optical axis direction. The reflective material is coated so that it is diffused inwardly, and a portion of the surrounding portion facing each of the laterally diffused segments is shaped such that light rays exit the light guide parallel to the second optical axis. In the form of a lens substantially corresponding to the lateral diffusion segment whose focal point is opposite, the device further comprises the light beam positioned above and below the basic cross-section opposite to the lateral segment and emerging. Pot has two lateral reflector for reflecting towards the front.

  Other features and advantages of the present invention will become apparent from the following detailed description, which proceeds with reference to the accompanying drawings.

  FIG. 4 shows a lamp or display made in accordance with the present invention. This device includes the light guide 10 and the rear reflector 32 described at the beginning of the specification.

  Although the volume of the light or display is created by the vertical basic cross section of the device moving along the guide line 18, the following description only describes the vertical basic cross section of the light or display. .

  FIG. 5 shows a vertical basic section 16 of the light guide 10 of FIG.

  The profile 20 of the basic cross section 16 includes a front peripheral portion 22 and a rear peripheral portion 24. Portion 22 performs the lighting or display function required for the vehicle.

  The rear peripheral portion includes a rear light diffusing segment 26 from which an optical axis 28 extends laterally forward. The main optical axis 28 divides the basic section 16 into a substantially symmetric upper and lower parts.

  According to the invention, the rear reflector 32 is located behind the basic cross section 16 opposite the rear diffusion segment 26 along the optical axis 28.

  While the lamp or display is functioning, the light rays that reach the rear diffuser segment 26 and are guided into the light guide 10 are diffused behind the lamp. The symbol Rd in FIG. 5 indicates a light beam diffused behind the segment 26.

  The diffused light Rd reaches the reflective surface of the rear reflector 32, which reflects the reflected light Rr substantially in the direction of the rear peripheral portion 24 of the light guide 10 toward the front.

  This reflected ray Rr is first refracted when passing through the rear peripheral portion 24 and entering the inside of the basic section 16, and then passes through the front peripheral illuminating portion 22 and exits from the basic section 16. Is refracted again. Reference sign Re indicates a light beam emitted from the front surrounding illumination part 22.

  Without limitation, the shape of the rear reflector 32 is designed by those skilled in the art such that the outgoing ray Re is substantially parallel to the main optical axis 28. Those skilled in the art can freely adopt the shape of the rear reflector 32 so that the light Re exits around the main optical axis 28 as necessary.

  According to the second embodiment shown in FIG. 6, the front illumination part 22 of the basic section 16 is in the form of a convergent lens.

  As before, the focal axis of the converging lens 22 is substantially identical to the main optical axis 28, and its object focal point is located substantially in the rear diffuser segment 26. Here, the rays diffused by the rear diffusion segment 26 towards the front to the front ambient illuminating part 22 are refracted so as to emerge from the basic section 16 substantially parallel to the main optical axis 28.

  According to the present invention, the rear reflector 32 has a substantially arc-shaped cross-section in which the optical center is located substantially on the rear diffusion segment 26.

  Accordingly, the light rays Rd diffused rearward by the rear diffuser segment 26 reach the rear reflector 32, and then a part of the light rays Rr reflected by the rear reflector 32 passes through the front illumination part 22. The light is reflected back toward the optical center, i. Therefore, the emitted light Re is substantially parallel to the main optical axis 28.

  The shape of the front ambient illuminating part 22 is freely designed by a person skilled in the art so that these outgoing rays Re are scattered around the main optical axis 28 at the required angles.

  Although not shown, as a modification, the rear reflector 32 may be formed by a layer of a reflective material covering the outer surface of the light diffusion segment 26. Therefore, this lighting device functions in the same manner as the second embodiment shown in FIG. The reflective material used is, for example, aluminum.

  According to the third embodiment of the invention shown in FIG. 7, the basic cross section 16 of the light guide 10 has a second lateral light diffusing segment 34.

  Without limitation, in FIG. 7, this segment 34 is located on top of the rear perimeter 24. Therefore, it will be referred to as the top lateral segment 34 in the following description.

  Such a top diffusion segment 34 defines a second optical axis 36 that extends from the top diffusion segment 34 through the basic cross-section 16 and extends substantially from top to bottom. Here, this second optical axis 36 divides the basic section 16 into two substantially symmetrical parts.

  Advantageously, the second optical axis 36 is substantially perpendicular and orthogonal to the main optical axis 28, as shown in FIG.

  The lighting device includes a top side reflector 38 associated with the top side segment 34. The top side reflector 38 is located above the basic cross section 16, facing the top segment 34 along the second optical axis 36.

  The top light-diffusing segment 34 has a similar effect on guided light rays as the rear light-diffusing segment 26.

  Thus, when the guided light rays reach the top lateral segments 34, they are diffused, in particular, outside and above the basic section 16.

  The top reflector 38 has the shape of a parabolic arc where the object focus is located substantially on the top lateral light diffusion segment 34. The top reflector 38 is oriented such that the rays Rd 'diffused upward in the direction of the reflector 38 are reflected by the top reflector 38 in a direction substantially parallel to the main optical axis 28.

  This third embodiment can be combined with the first two embodiments, or any one of its variants, for example, as shown in FIG. 7, the first embodiment.

  Although not shown, according to the modification of the combination shown in FIG. 7, the rear reflector 32 and the top reflector 38 are integrally formed.

  According to a fourth embodiment of the present invention shown in FIG. 8, a lighting device made according to the previous embodiment has a lower part substantially below the second optical axis 36 and located below the basic section 16. A side reflector 40 is provided.

  This lower side reflector 40 directs the light rays Re ′ diffused downward by the top segment 34 and then refracted by passing through the lower part of the rear peripheral part 24 of the basic cross section 16 substantially to the front. It is intended to be reflected toward.

  According to the embodiment shown in FIG. 8, this part of the rear peripheral part 24 that refracts the downwardly diffused light rays is in the form of a convergent lens in which the object focus is located substantially on the top diffuser segment 34.

  Accordingly, the light beam Re 'diffused downward by the top segment 34 is refracted by the rear peripheral portion so as to exit substantially parallel to the second optical axis 36.

  Here, the lower lateral reflector 40 has a generally parabolic shape whose focal point is identical to the image of the top segment 34 in the lens formed by the lower portion of the rear peripheral portion 24, and Are oriented such that downwardly refracted light rays are reflected forward substantially parallel to the main optical axis 28.

  According to a variant of the invention not shown, the top reflector 38, the lower reflector 40 and the rear reflector 32 are made in one piece.

  Although not shown, according to a variant of the third and fourth embodiments, the lateral diffusion segments 34 are located on the lower part of the rear peripheral part 24. Such a reversal of the position of the lateral diffusion segment 34 does not change the overall function of the light or the display. Therefore, the above description is applicable to such a modification except that it is symmetric with respect to the main optical axis.

  According to the first two embodiments, shown in FIG. 9, and the fifth embodiment which can be combined with their variants, the basic section 16 has a top diffusion segment 34 and a lower diffusion segment 42.

  The lower light diffusing segment 42 is located on the outer surface of the rear peripheral portion 24 at the intersection with the previously described, ie, diametrical, second optical axis 36 with respect to the basic section 16. Thus, the top segment 34 and the lower segment 42 face each other.

  Each of these side segments 34 and 42 is coated with a reflective material, for example, aluminum. Thus, light is diffused exclusively toward the inside of the basic cross-section 16, ie, downward by the top segment 34 and upward by the lower segment 42.

  The lighting device also includes two side reflectors, a lower portion 40 and a top portion 44. These are diffused by the two side segments 34 and 42 towards the interior of the basic section 16 and then try to reflect forwardly the rays Re 'and Re "refracted by the rear peripheral portion of the basic section 16 respectively. Is what you do.

  In the example shown in FIG. 9, the rear diffusion segment 26 is coated with a reflective material such as aluminum.

  Here, the top and a portion of the lower portion of the rear perimeter 24 have the form of a converging lens such that the segments 34 and 42 diffuse the light substantially parallel to the second optical axis 36.

  The side reflectors 40 and 44 have an approximately parabolic shape which is identical to the image of the top 34 and lower 42 segments in the lens, the focal point of which consists of the top and bottom portions of the rear peripheral portion 24, respectively. And the reflectors are oriented to reflect the light rays refracted by the rear peripheral portion 24 forward and substantially parallel to the main optical axis 28.

  Although not shown, according to another embodiment of the present invention, light rays diffused rearward by rear segment 26 are reflected according to the first two embodiments. In that case, the top reflector 44, the lower reflector 40, and the rear reflector 32 are integrally formed.

  Although not shown, according to a variant of the fifth embodiment, the light guide 10 comprises only one lateral diffuser segment 34 or 42 and a single respective associated reflector 40 or 44.

  Thus, the present invention firstly reduces the distance from the lighting system by first increasing the brightness of the light source, as seen in the rear diffuser segment 26, or by increasing the apparent surface by the segments 42 and 34. It increases the intensity of light emitted toward the part.

  Although not shown, according to a variant of each embodiment, the diffusing segments 26, 34 and 42 and their associated reflectors can be made on only one or several light-guiding parts 10.

FIG. 4 is a perspective view showing a light guide manufactured according to a conventional design. FIG. 2 is a vertical basic cross-sectional view of the light guide, taken along a cut surface 2-2 in FIG. 1. FIG. 2 is an enlarged view showing a part of the light guide indicated by an arrow 3 in FIG. 1. FIG. 2 is a perspective view showing a lamp or a display device mainly including the light guide and the reflection plate of FIG. 1 made according to the present invention. FIG. 5 is a cross-sectional view showing a path of a light beam along a cutting plane 5-5 in FIG. 4 by a continuous line. FIG. 6 is a view showing a second embodiment of the lamp or the display device, similar to FIG. 5. FIG. 6 is a view showing a third embodiment of a lamp or a display device similar to FIG. 5. FIG. 7 is a view showing a fourth embodiment of the lamp or the display device, similar to FIG. 5. FIG. 6 is a view showing a fifth embodiment of a lamp or a display device similar to FIG. 5.

Explanation of reference numerals

REFERENCE SIGNS LIST 10 light guide 12, 14 end face of light guide 16 basic cross section 18 guide line 20 outline of basic cross section 22 front peripheral illumination part 24 rear peripheral part 26 rear light diffusion segment 28 main optical axis 30 light source 32 rear reflector 34 top side Diffusion segment 36 Second optical axis 38,44 Top side reflector 40 Lower side reflector 42 Lower light diffusion segment Rc Incident light beam Rd, Rd ', Re', Re "Diffuse light beam Re Outgoing light beam Rr Reflected light beam

Claims (12)

  1. A light or display for a car,
    A light guide (10), at least a part of which is generated by a substantially circular, vertical basic cross section (16) moving along a guide line (18), the contour of said basic cross section (16); (20) includes a front perimeter illuminating portion (22) and a rear perimeter portion (24) including a rear light diffusing segment (26), wherein the basic cross section (16) extends from the diffusing segment (26) A light guide (10) including a main optical axis (28) having a lateral direction (T) extending from the rear to the front to the front periphery (22);
    A light source (30) emitting a light beam (Rc) incident on the light guide (10) via at least one end face (14) as guided by said light guide (10);
    The guided ray (Rc) propagates through the light guide (10) by being continuously reflected generally in the general direction of the guide line (18) and to the rear diffuser segment (26). The rearwardly scattered ray (Rd), where the guided ray (Rc) arriving is diffused and exits outside the length, and is contained within a given solid angle of the main optical axis (28) The light (Re) diffused inwardly of the guide (10) is refracted by the front illuminating portion of length;
    Furthermore, from said basic section (16), at least one reflector plate (32, 32) for redirecting light rays (Rd, Rd ', Re', Re ") passing through the rear peripheral part (24) forward. 38, 40, 44), located opposite the rear diffuser segment (26) along the main optical axis (28) and diffusing the rays (Rd) towards the rear, where they A device comprising a rear reflector (32) that reflects inwardly of said basic cross section (16) as refracted by a front peripheral portion (22).
  2.   In a plane orthogonal to the guide line (18), the rear reflector (32) reflects light rays (Rr) emitted by the rear light diffusing segment (26) from which the front reflector (32) reflects the light (Rr). Device according to claim 1, characterized in that it has a shape such that it emerges substantially from 22) parallel to the main optical axis (28).
  3.   The rear reflector (32) reflects the rays (Rd) diffused towards the rear in a convergent manner towards the rear diffused segment (26). Equipment.
  4.   The device according to claim 3, characterized in that the rear reflector (32) has an arc-shaped vertical basic cross section centered globally on the rear diffuser segment (26).
  5.   The device according to claim 3, characterized in that the rear reflector (32) consists of a layer of reflective material covering the outer surface of the rear diffuser segment (26).
  6.   6. The device according to claim 3, wherein the front peripheral portion forms a converging lens whose object focus is located approximately on the rear diffuser segment. Apparatus according to claim 2 in combination.
  7. The rear peripheral portion (24) of the basic cross section (16) includes a top lateral light diffusing segment (34), which segment is within the basic cross section (16) of the light guide (10). Defining a second optical axis (36) extending downward from the segment (34) and diffusing said guided ray (Rc) inward, downward and outward of said length;
    Further, the top side along the second optical axis (36) such that the optical system reflects the ray (Rd ') diffused upward by the top side segment (34) substantially forward. 7. The device according to claim 1, further comprising a top side reflector (38) located above the basic cross section (16), opposite the diffusion segment (34). 8. apparatus.
  8.   The apparatus according to claim 7, characterized in that the second optical axis (36) is substantially perpendicular and orthogonal to the main optical axis (28).
  9.   The object focus so that the top side reflector (38) reflects the upwardly scattered light ray (Rd ') forward in a direction substantially parallel to the main optical axis (28). Device according to any of claims 7 or 8, characterized in that has a parabolic shape located on the top lateral diffusion segment (34).
  10.   Inline with the second optical axis (36), below the basic section (16) and diffused downward by the lateral diffusion segments (34) and refracted by the rear peripheral portion (24). 10. A light reflector (40) according to any of claims 7 to 9, characterized in that it comprises a lower side reflector (40) for reflecting said light beam (Re ') forward and parallel to said main optical axis (28). An apparatus according to any one of the above.
  11.   The rear peripheral portion (24) is such that the image focus is substantially the top lateral diffusion segment (such that the downwardly diffused ray (Re ') exits parallel to the second optical axis (36). Device according to claim 10, characterized in that it comprises a lower part in the form of a lens corresponding to (34).
  12. The rear peripheral portion (24) of the basic cross section (16) has a first top lateral diffusion segment (34) and a second lower lateral diffusion segment (42), which segments are the first lateral diffusion segment (42). Defining a second optical axis (36) extending in a substantially vertical manner from the top lateral diffusion segment (34) to the second lower lateral diffusion segment (42);
    On the outer surface of the first (34) and second (42) lateral diffusion segments, light rays are directed by the lateral diffusion segments (34, 42) in a direction generally in the direction of the second optical axis (36). A reflective material is coated so as to diffuse toward the inside of the cross section (16);
    A portion of the peripheral portion (24) facing each of the lateral diffusion segments (34, 42) is such that the light rays (Re ', Re ") pass from the light guide (10) to the second optical axis (36). ) In the form of a lens whose object focal point substantially corresponds to said lateral diffusion segment (34, 42) so as to exit in parallel to said lateral segment (34, 42). Two side reflectors (40, 44) located above and below the basic section (16), respectively, and reflecting the emitted light beams (Re ', Re ") substantially toward the front. An apparatus according to any of the preceding claims, wherein
JP2004023004A 2003-01-30 2004-01-30 Light guide with reflector Active JP4383192B2 (en)

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Also Published As

Publication number Publication date
US7104678B2 (en) 2006-09-12
US20040184286A1 (en) 2004-09-23
FR2850731B1 (en) 2005-09-09
FR2850731A1 (en) 2004-08-06
JP4383192B2 (en) 2009-12-16
AT438827T (en) 2009-08-15
EP1443265B1 (en) 2009-08-05
DE602004022348D1 (en) 2009-09-17
EP1443265A1 (en) 2004-08-04

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